Multiple thermal magnetic relaxation in a two-dimensional ferromagnetic dysprosium(iii) metal–organic framework. Issue 127 (11th December 2015)

• Record Type: Journal Article
• Authors: Liu, Cai-Ming; Xiong, Jin; Zhang, De-Qing; Wang, Bing-Wu; Zhu, Dao-Ben
• Is Part Of: RSC advances. Volume 5:Issue 127(2015)
• Page Start: 104854
• Page End: 104861
• Publication Date: 2015-12-11
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra23638j
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Intramolecular ferromagnetic interaction exists in a dysprosium(iii ) MOF with a highly ordered 2D (4, 4) grid network, showing two-step thermal magnetic relaxation. Abstract : A new two-dimensional (2D) lanthanide metal–organic framework, {[Dy2 (HCAM)3 (H2 O)4 ]·2H2 O} n (1, H3 CAM = 4-hydroxypyridine-2, 6-dicarboxylic acid) has been hydrothermally synthesized and structurally characterized using single-crystal X-ray diffraction. There are two crystallographically independent dysprosium atoms in1, displaying spherical tricapped trigonal prism geometry and square antiprism geometry, respectively. The dysprosium(iii ) ions are connected with each other through the bridging HCAM 2− anions, generating a classical 2D (4, 4) grid structure. Magnetic investigations revealed that intramolecular ferromagnetic interactions exist among the dysprosium(iii ) ions in1, which shows field-induced two-step thermal magnetic relaxation, with the effective thermal barriers of 63.5 K and 57.1 K, respectively.